Search Publications

Nonlinear effects associated with the dispersive Alfvén waves in space plasmas

Sharma, R. P.; Kumar, Sanjay

This paper presents the model equations governing the nonlinear dynamics of the dispersive Alfvén wave (DAW) in the low-β plasmas (β ≪m_e/m_i; known as inertial Alfvén waves) applicable to solar corona and intermediate-β plasmas (m_e/m_i≪β≪1; kinetic Alfvén waves) applicable to solar wind in Earth's magnetos…

UV emission line shifts of symbiotic binaries

Friedjung, M.; Mikołajewska, J.; Zajczyk, A. +1 more

Aims: Relative and absolute emission line shifts have been previously found for symbiotic binaries, but their cause was not clear. This work aims to better understand the emission line shifts.
Methods: Positions of strong emission lines were measured on archival UV spectra of Z And, AG Dra, RW Hya, SY Mus and AX Per and relative shifts b…

Space Weather in Focus: A Decade in Review

Tretkoff, Ernie

In the past decade, many events, discoveries, and publications have brought attention to how the Sun affects technologies, increasing awareness of space weather's effects among scientists, policy makers, and the public. As the decade comes to a close, Space Weather staff writers wondered what comes into focus after a quick scan of the past 10 year…

Tracking Nonradial Motions and Azimuthal Expansions of Interplanetary CMEs with the Solar Mass Ejection Imager

Webb, David; Kahler, Stephen

The trajectories of interplanetary CMEs (ICMEs) are modified by their interactions with solar wind streams. These interactions can result in non-radial deflections of ICME trajectories and changes to their rates of azimuthal expansion. The Solar Mass Ejection Imager (SMEI), launched earlier in 2003 January, has provided heliospheric images of seve…

A precise modeling of Phoebe's rotation

Souchay, J.; Cottereau, L.; Aleshkina, E.

Aims: Although the rotation of some Saturn's satellites in spin-orbit has already been studied by several authors, this is not the case for the rotation of Phoebe, which stands out because it is non-resonant. The purpose of the paper is to determine for the first time and with precision its precession-nutation motion.
Methods: We adopt a…

Highly magnetized neutron star in GX 301-2

Klochkov, D.; Santangelo, A.; Ferrigno, C. +4 more

The angular momentum of matter accreting onto the neutron star produces significant spin-up torque. Effective braking mechanism must exist to balance it in order to explain the existence of slowly-rotating X-ray pulsars. The efficiency of breaking steeply decreases with the rotational frequency and the magnetic field strength. Slowly rotating sour…

SSS in young stellar populations and the ``prompt" component of Type Ia supernovae

Nelson, T.; Orio, M.; Di Mille, F.

We present the results of a search for UV and optical counterparts of the SSS population in M 31. We find that out of the 56 sources we included in our search, 16 are associated with regions of ongoing or recent star formation. We discuss two particularly interesting sources that are identified optically as early type stars, one of which displayed…

Mars geology from three - dimensional mapping by the High Resolution Stereo Camera (HRSC) Experiment on Mars Express. An introduction to the special issue of Earth Planetary Science Letters

Greeley, Ronald; Neukum, Gerhard; Hiesinger, Harald +1 more

Solar Wind Monitoring with SWIM-SARA Onboard Chandrayaan-1

Barabash, S.; Lundin, R.; Futaana, Y. +19 more

The SARA experiment aboard the Indian lunar mission Chandrayaan-1 consists of two instruments: Chandrayaan-1 Energetic Neutral Analyzer (CENA) and the SolarWind Monitor (SWIM). CENA will provide measurements of low energy neutral atoms sputtered from lunar surface in the 0.01-3.3 keV energy range by the impact of solar wind ions. SWIM will monitor…

Theoretical properties of offset bipolar electric field solitary structures in space plasmas

Torkar, Klaus; Liu, Zhenxing; Shi, Jiankui +1 more

The bipolar electric field solitary (EFS) structures have been frequently observed in the near Earth plasma regions, such as auroral zone, magnetopause, cusp regions, and magneto-tail. Sometimes these structures are observed as offset bipolar structures. In this paper, the properties of the offset bipolar EFS structures parallel to the magnetic fi…